Keep returning unwrapped porcelain box (7)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

sÈVRES (porcelain, of fame) + BOx, together missing the first and last letters (unwrapped), and reversed (returning). As 8ac above, quite difficult to unravel, especially if you are not au fait with the porcelain-manufacturing commune. You have to get to definition 26 in Chambers to find ‘keep’ = ‘observe’, as in celebrate, but I’m happy with ‘keep’ = ‘tend’ = ‘supervise’, etc. A last-minute guess for me.